NTNUJAVA Virtual Physics Laboratory
Enjoy the fun of physics with simulations!
Backup site http://enjoy.phy.ntnu.edu.tw/ntnujava/

JDK1.0.2 simulations (1996-2001) => Wave => Topic started by: Fu-Kwun Hwang on January 29, 2004, 08:06:23 pm



Title: Double slit interference
Post by: Fu-Kwun Hwang on January 29, 2004, 08:06:23 pm
  • Each click to thebutton will open a new window. Try it!

  • You can change:

    1. You can change size of the popup window.

    2. distance between slits, initial value = 150


    3. wavelength of plane wave, initial value=15

    4. Hit the "Start" button inside the window will start the animation

    5. You can also drag one of the slit to change distance between slits

    6. If you click or drag the LEFT mouse , the animation suspend. animation resume when it is released.

    7. distances from both slits to the mouse (d1,d2) are shown in the "texField"

      with format "d1 - d2 = path difference" , numbers are divided by wave length

      If you click or drag the LEFT mouse , the animation suspend. Click right mouse button again to resume.

    8. Close the created window to Quit.


    Please chec out Effect of a Medium on a Double Slit Interference Pattern (http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=1178.0) to view spectrum for visible light.
    (http://www.phy.ntnu.edu.tw/ntnujava/index.php?action=dlattach;topic=20.0;attach=3980;image)
    The following is a demostration with microwave
    [youtube=kO2yFC7_k2s]


    Title: topic20
    Post by: on January 30, 2004, 11:12:43 am
    Subject: double-slit applet
    Date: Tue, 25 Aug 1998 14:45:37 -0400 (EDT)
    From: "James Bo Begole" <begolej@simon.cs.vt.edu>
    Reply-To: "James `Bo' Begole" <begolej@vt.edu>
    To:  hwang@phy03.phy.ntnu.edu.tw
    I liked to older version of the double slit applet better.  The interface
    on the old one was much easier to use, although it was slower to run.  I
    can't map the frequency to a color in my head.  Can you put up a link to
    your old version?

    Why am I interested in your applet?  My interest stems from our work on
    collaborative learning systems. I have a system called Flexible JAMM (Java
    Applets Made Multiuser) that allows the shared use of single-user applets,
    such as yours.  Do you mind if we use the old version to test how
    difficult it will be for a developer to make an applet that can be used in
    this system?

     Flexible JAMM: http://simon.cs.vt.edu/jamm

            -Bo


    Title: Re: Double slit interference
    Post by: Calistes on November 17, 2004, 01:23:14 pm
    Dear sir
    This is a nice and suitable applet for the demo. Again in this applet if there is a vertical line like a screen and the indications of the points where the anti nodal and nodal lines meet  this line, like in the Young's expt. i think the applet would have been more informative
    javascript:emoticon(':roll:')
    Rolling Eyes


    Title: topic20
    Post by: murray anderson on July 26, 2005, 01:26:49 pm
    Excellent applet - for use in physics classes on light and sound..............well done.


    Title: Re: Double slit interference
    Post by: saurav verma on August 11, 2007, 11:45:39 pm
    can u pls tell me how is intensity(maximum & minimum) related to the fringe width???


    Title: Re: Double slit interference
    Post by: Fu-Kwun Hwang on August 12, 2007, 12:16:03 am
    Please check out the following simulation first : single/multiple slit diffraction/interference (http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=129.0)

    It will show how the intensity changed with several parameters (slit width, slit separations... etc).


    Title: Re: Double slit interference
    Post by: mikephys on April 17, 2009, 09:35:51 am
    Thank you for this applet.  This is exactly the illustration I needed in conjunction with our ripple tank demonstration of two-source interference. :)


    Title: Re: Double slit interference
    Post by: Fu-Kwun Hwang on July 07, 2009, 09:32:03 am
    Here is another EJS version of the same applet.